TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. net_ratelimit: 26 callbacks suppressed TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: use-after-free in tls_write_space+0x2b8/0x310 net/tls/tls_main.c:220 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. Read of size 1 at addr ffff88809bd72ba0 by task syz-executor.3/12718 CPU: 0 PID: 12718 Comm: syz-executor.3 Not tainted 4.19.34 #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 tls_write_space+0x2b8/0x310 net/tls/tls_main.c:220 tcp_new_space net/ipv4/tcp_input.c:5141 [inline] tcp_check_space+0x435/0x730 net/ipv4/tcp_input.c:5152 tcp_data_snd_check net/ipv4/tcp_input.c:5162 [inline] tcp_rcv_established+0x9f0/0x1f20 net/ipv4/tcp_input.c:5653 tcp_v6_do_rcv+0x4b3/0x13c0 net/ipv6/tcp_ipv6.c:1326 tcp_v6_rcv+0x2b9b/0x3520 net/ipv6/tcp_ipv6.c:1555 ip6_input_finish+0x374/0x1810 net/ipv6/ip6_input.c:383 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:426 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x1e7/0x320 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ipv6_rcv+0x119/0x430 net/ipv6/ip6_input.c:271 __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4918 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5028 process_backlog+0x206/0x750 net/core/dev.c:5839 napi_poll net/core/dev.c:6262 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6328 __do_softirq+0x266/0x92f kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1051 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:336 do_softirq kernel/softirq.c:328 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] release_sock+0x158/0x1c0 net/core/sock.c:2864 tls_sk_proto_close+0x69b/0xaa0 net/tls/tls_main.c:312 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472 __sock_release+0xd3/0x2b0 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1140 __fput+0x2df/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x1961/0x1d50 kernel/signal.c:2385 do_signal+0x95/0x1950 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2885952c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: 00000000003446e0 RBX: 0000000000000006 RCX: 0000000000458c29 RDX: fffffffffffffd47 RSI: 00000000200005c0 RDI: 0000000000000005 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f28859536d4 R13: 00000000004c659f R14: 00000000004daf70 R15: 00000000ffffffff Allocated by task 12718: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 kmem_cache_alloc_trace+0x152/0x760 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] create_ctx+0x46/0x1f0 net/tls/tls_main.c:553 tls_init+0x15b/0x7a0 net/tls/tls_main.c:686 tcp_set_ulp+0x21c/0x600 net/ipv4/tcp_ulp.c:155 do_tcp_setsockopt.isra.0+0x327/0x2330 net/ipv4/tcp.c:2750 tcp_setsockopt+0xc4/0xf0 net/ipv4/tcp.c:3064 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3044 __sys_setsockopt+0x180/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 12718: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3503 [inline] kfree+0xcf/0x230 mm/slab.c:3822 tls_ctx_free.part.0+0x32/0x40 net/tls/tls_main.c:251 tls_ctx_free net/tls/tls_main.c:246 [inline] tls_sk_proto_close+0x68e/0xaa0 net/tls/tls_main.c:307 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:472 __sock_release+0xd3/0x2b0 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1140 __fput+0x2df/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 get_signal+0x1961/0x1d50 kernel/signal.c:2385 do_signal+0x95/0x1950 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88809bd72ac0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 224 bytes inside of 512-byte region [ffff88809bd72ac0, ffff88809bd72cc0) The buggy address belongs to the page: page:ffffea00026f5c80 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0xffff88809bd72840 flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffffea0002808e48 ffffea0002a62508 ffff88812c3f0940 raw: ffff88809bd72840 ffff88809bd720c0 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809bd72a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88809bd72b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88809bd72b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88809bd72c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809bd72c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================